Description

This article explains how to clear the following commit error:

error: Drop probability of first  fill level 90 must be zero for drop profile AF_LOW_DROP

Symptoms

Commit failed with the following error message:

# commit check
error: Drop probability of first  fill level 90 must be zero for drop profile AF_LOW_DROP
error: configuration check-out failed

Solution

This error message occurs when the first drop-probability value is a non-zero or after upgrading to JUNOS version 18.XX (if we have the incorrect configuration). The reason is because in the newer code, there is better commit check progress which will not allow unsupported configuration in the chassis.

Delete and reconfigure the drop profiles with first drop-probability value as zero:

Example: 

[master:0][edit]
root#delete class-of-service drop-profiles LOW_DROP
root#set class-of-service drop-profiles LOW_DROP interpolate drop-probability 0
root#set class-of-service drop-profiles LOW_DROP interpolate drop-probability 100
 
[master:0][edit]
root# commit check
configuration check succeeds
fpc1:
configuration check succeeds

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